Step 1: Sensor Module

There are 3 pins in sensor module we have to connect +5v pin to pin 9 of ic ,gnd pin to pin 8 of ic and output pin to pin 1 of ic for 1st sensor and 2nd sensor output pin to be connected to pin 2 of ic.i used ir proximity sensor module ,you can also use led and ldr module.the second circuit diagram is fpr led and ldr module

Step 2: Motor Connections

Connect positive terminal of 1st motor to pin 9 of ic so as the positive terminal of 2nd motor also ,then negative terminal of motor 1 to 15 th pin of ic and negative terminal of motor 2 to be connected to 16 th pin of ic.

Step 3: Power Supply

Connect positive end of 9v battery to pin 9 of ic and negative end to pin pin 8 of ic where we connected sensor gnd pins.that's all about the connections.THAT'S IT THE LINE FOLLOWER IS READY.make the track by marking black insulating tape in white chart so that whit reflect ir rays and black absorbs the rays.